Molding for plastered walls



e. s. KNAPP.

MOLDING FOR PLASTERED WALLS.

APPLICATION FILED IAN.23, 1919'. v

Patented Mar. 30,, LQZQ.

L Y A i Y (73%;: y

.tul improvements in ing edge and and as a ground, or gage to determine the til-y,

Another objectIof my invention is to pro- UNITED STATES rarENT OFFICE.

GEORGE S. KNAPP, OF LA GRANGE, ILLINOIS, ASSIGNOR T0 KNAPP BROTHERS MANU FAOTURING CG'IPANY. OF CHICAGO, ILLINOIS,

A CORPORATION OF ILLINOIS.

MOLDIHG' FOR PLASTERED WALLS.

Specification of Letters Patent. t t

Application filed January 23, 1919. Serial-No. 272,626.

To all whom it may concern:

Be it known that L-Gsouos S. Knariga citizen of the United States, residing at La Grange, in the county of Cook and State of Illinois, have invented certain new and use- Moldings for Plasterd Walls, of which thefollowing is a specification.

My invention relates to a new and improved-form ot' molding to serve as a finish protection for plastered walls thickness of the. plaster coating.

ne of the objects of my invention is to provide an improved edge of plastered walls, the walls, for and the like, strength and rigidity and requires only a minimum quanof metal for its production.

, vide a-molding of, preferably, Roman ovolo or quarter-round type both of which tial contact with the'structure to be pl-as tel-ed, to which the molding is to be attached, and having'a laterally extending flange in a. plane substantially parallel with the surface upon which-the molding is to be applied,

and in 'a plane in which the base wallet the molding would be included, lf it had a basewall. v

' In the arcompanying drawings I have shoivn "the; application oi my improved clearly illustrate moldingin connectionpvith a door opening in the wall of a building. wherem:--

Figurel is a sectional view ot'a part of the wall, on one side of the. doorv opening, showing the usual stud or buck constituting o'ne boundary of the wall. around the opening, and a portion of the wall of tireproof material.

' .Fig. 2 1s a perspective view. showing parts wl 1 in section. and ptll'ts'bl'fllitll away to more the improved molding. as

,it appears in the partly finished Wall.

In both oi the views the same reference characters are employed to indicate 'slmilar parts.

which may he of wood or the like, and usually termed a buck. 7 and 8 are parts of molding to cover and having two laterally 5 is a part of a fircproof'wall, such as til- 'ing or the like. terminating in a -S tud6,

' and the edge 14 of the buck 6, are in almoment when the wall is first constructed, but in the course of time the buck 6 is liable to shrink more or less and, therefore, unless the plaster is otherwise supported at the point of joinder 16, it is liable to crack. To prevent cracking I extend a lateral flange 17. from the lower edge of the vertical Wall member 12, and for the purpose of strength I produce, at spaced apart intervals, arch or" corrugated portions" 18, alternating with openings 19, through which to key the plaster. Themore or less vertical wall 12 is also provided with openings 20 through which the plaster may be caused to pass into the hollow portion 21 of the molding. To more completely key the plaster 2:2 while in contact with the molding, I prefer to slightly inturn the wall 12', as shown in Fig.

edge of the flange 17 may .be temporarily secured to the structure 5, by nails 23.

In the upper edge of Fig. 1, I show the curved wall 11 of the molding 10 to be somewhat longer and to enter arabbet that may be made in the edge of the back (5, as at 25, so that when the trim or finish 8 is placed, after the Wall has been plastered, the inner edge of the curved wall 11 will he firmly held in place, or, as shown at thelower edge of Fig. 1, the finish strip 8 may he placed just a little beyond the inner edge of the curvedwall 11 to hide the joint and to hold the. molding. in place. By either of the structures the )lastering may be completely finished beiore the trims 7 and 8 are placed 'in positions, and therefore the trim will not be soiled or disturbed-by the effect of the plaster during its application.

Now it will be manifest that with both of the salient inner edges, the edges 25 and 26. of the molding, in contact-With the surface 12- (if the buck, that considerable .stress or impact may be received by the exposed joint 1.6 between the parts 5 edge of the l:ii1@, with respect to the curved wall 11 of the molding without its yielding and disturbing the plaster, and furthermore, since the flange 17 bridges the and 6, any shrinking or other slight displacement of the part (5 will not cause the plaster toanove in and make cracks in line with the, joint, as usual ,where the flange 17 is not suiiiciently wide to bridge the longitudinal edge of the buck. In the upper part of F 1, I have shown a channel 27, in the moldinglO, within which screws 28 may be placed, at suitable intervals, and by which additional means are thus afi'orded for securing the molding to the wall structure.

While I have herein shown a single cm hodiment of my'invention, for the purpose of clear disclosure it changes may be made in the general arrangement and configuration oi the pants within the scope of the appended claims.

Having described'my invention, what I claim ir:' y l;

l. A sheet metal edge finishing molding for plastered walls, having in combinative association an outwardly curved member to provide the finishing strip for the vertical plaster, haviin its outer edge frccand an iuturned mem er in a vertical wall to which it is applied, to provide in the strip a finishing gated and perforated ally from the base of ground and a' corruthe vertical melnbelz.v

2. A sheet metal edge finishing moldings.

wall and a generally vertical mem is manifest that conjunction .with a plate extending laten.

for plastered walls having in coinbinative association corrugated and perforated plate bent at one longitudinal edge to provide an outstanding member in a plane substantially vertical to the wall to which it is to be applied and an incurved member to provide a in combination with a wall, comprising an outwardly curved member having a longitu- "dinally extending channel within which to place screws to secure the moldin to the r, and,

a flange, secured to the inner edge of the."

vcrtical member and extending laterally at substantially right angles thereto, and, means, taking through the flange, for sectaring it to the wall. 4. A m0lding,.substantially as described; adapted to be applied to an outwardly curved member'and a generally vertical but slightly overhanging I'nemher having a flange extending laterally from its inner edge, aid vertical member and'said flauge'being provided with a plurality of perforations and securing means passing through said flange to, secure it to the wall.

In testimony whereof I hereunto subscribe my name.

GEORGE s. KNAPP.

a wall comprising I 

